exclude :test_aset, "needs investigation"
exclude :test_assoc, "needs investigation"
exclude :test_clone, "Exception(TypeError) with message matches to /Cannot clone ENV/."
exclude :test_delete, "needs investigation"
exclude :test_fetch, "needs investigation"
exclude :test_frozen_env, "TypeError expected but nothing was raised."
exclude :test_getenv, "needs investigation"
exclude :test_has_key, "needs investigation"
